<template>
    <div>
        <h3>欢迎访问后台管理系统！</h3>
    </div>
</template>

<style lang="less" scoped>
div{
height: 100%;
}
h3{
  position: absolute;
  left: 40%;
  top: 30%;
  font-size: 50px;
}
</style>